CVE-2011-1271

high Microsoft
CVSS v3 Base Score
7.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
EPSS Score
13.6%
Exploitation probability in 30 days
Top 6% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
Low
Published: May 10, 2011 (5483 days ago)
Last Modified: April 29, 2026
Vendor: Microsoft
Source: NVD

Description

The JIT compiler in Microsoft .NET Framework 3.5 Gold and SP1, 3.5.1, and 4.0, when IsJITOptimizerDisabled is false, does not properly handle expressions related to null strings, which allows context-dependent attackers to bypass intended access restrictions, and consequently execute arbitrary code, in opportunistic circumstances by leveraging a crafted application, as demonstrated by (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka ".NET Framework JIT Optimization Vulnerability."

CWE

CWE-264

Affected Products

microsoft .net framework

References

🔗 stackoverflow.com 🔗 docs.microsoft.com 🔗 oval.cisecurity.org 🔗 stackoverflow.com 🔗 docs.microsoft.com